Self-sharpening horseshoe



No Model.) I

- T. W. LEONARD.

SELF SHARPENING HORSB$HOE- No. 269,947. Patented Jan. 2. 1883.

UNITED STATES PATENT OFFICE.

THOMAS-W. LEONARD, or DETROIT, MICHIGAN.

SELFV-SHARPENING HORSES'HOE.

SPECIFICATION forming part of Letters Patent No. 269,947, dated 'J'anuary 2, 1883,

Application filed August 2, 1882. (No modelJ' To all whom it may concern Be it known that I, THOMAS W. LEONARD,

of Detroit, in the county of Wayne and State.

of Michigan, haveinvented new and useful Impro'vementsin Self Sharpening Horseshoes; andl do hereby declare that the following is a full, clear, and. exact description thereof,

reference being had to the accompanying drawings, which form a part of tl|isspecification.

' Thenature of this invention relates to cer tain new and useful improvements in that class of horseshoes in which theheel and toe calks are so constructed as to become self-sharpening by wear; and the invention consists in the peculiarconstruction and arrangement ofparts, as hereinafter described and claimed.

Fignre'l is a bottom perspective of my improved shoe. Fig. 2 is an enlarged perspective view of the toe-call: detached, showing the manner of construction. Fig. is an enlarged perspective view of a heel-call: detached. I

In the accompanying drawings, which form a part of this specification, A represents a horseshoe, the bodyofwhich is of the ordinary construction.

B represents the toe-calk, which is made of a thin piece of tempered steel re-enforced upon each side by a piece-of wrought-iron welded to the steel, during which action upon each end the said end is forged into a sharp lug,-whichenters the body of the shoe and is welded thereto when the calk is put in place. The steel piece is lettered aand the re-enforcing pieces are lettered b. Otherwise in shape and manner of securing to the shoe the toe-call; is like those ordinarily employed.

0 represents the heel-calk, which is made of a piece of steel re-enforced on each side with a 'piece of wrought-iron,'as already described in the toe-calk. The heel-calkis drawn dogvn to apoint, c. Ordinarily the heel of the shoe is drawn and bent at right angles to the body to form the. heel-calks; but inv It will be understood that the hole'for the to be taken off for-the purpose of sharpening the calks, as in wear the softer iron will wear gradually, leaving theharder steel to protrude, thereby presenting the sharpened surface required, and this will continue until the calks are worn oli'. close to the body of the shoe.

pieces of metal--the two outerones of wrough tiron and the intervening piece of steel-are welded together, and the pointed lugs d formed at the same time. This toe calk is then properly welded to the body of the shoe, which is entirely of wrought-iron. The heel-calks are formed in the same way and welded to the heel of the shoe, as described.

It will also be understood that the calks are sharpened after they are in place upon the shoe, which can be readily done with a red heat, or a heat which will not interfere with the weld. l

I am aware that the bodies of horseshoes have been made of iron and steel welded together, as described in Patents Nos. 173,517 and 219,630. I am also aware that ordinary calks have been welded to the body of a wrought-metalshoe, as described in Patent No. 14,852. I am also aware that wedge-shaped teeth of steel, the largest ends fitting into a groove in the calk,have been secured by striking the parts together by dies, as described in the Patent No. 246,505, and that a calk having.

It must be understood thatthree strips or quently sharpened. Hence I disclaim the construction mentioned.

too

What I claim as my invention isbody of the shoe and subsequently sharpened, The horseshoe herein described, consistas set forth.

ing of wrought-iron body A, and calks B C,

formed of two outer strips or pieces of wrought metai and an intervening piece of tempered l Witnesses:

steel welded together and having sharpened H. S. SPRAGUE,

lugs d c, the said calks being welded to the S. KERNAN.

THOMAS W. LEONARD. 

